EP0041020A1 - Druckdosiereinheit für eine Bedienungseinrichtung für Fahrzeugbremsen - Google Patents

Druckdosiereinheit für eine Bedienungseinrichtung für Fahrzeugbremsen Download PDF

Info

Publication number
EP0041020A1
EP0041020A1 EP19810400809 EP81400809A EP0041020A1 EP 0041020 A1 EP0041020 A1 EP 0041020A1 EP 19810400809 EP19810400809 EP 19810400809 EP 81400809 A EP81400809 A EP 81400809A EP 0041020 A1 EP0041020 A1 EP 0041020A1
Authority
EP
European Patent Office
Prior art keywords
pressure
circuit
fluid
ring
drawer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19810400809
Other languages
English (en)
French (fr)
Other versions
EP0041020B1 (de
Inventor
Alain Constans
Denis Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0041020A1 publication Critical patent/EP0041020A1/de
Application granted granted Critical
Publication of EP0041020B1 publication Critical patent/EP0041020B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • B60T8/1812—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction
    • B60T8/1831—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction pressure reducing or limiting valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/141—Systems with distributor valve

Definitions

  • the invention relates to a braking control installation for a vehicle of the kind that includes two independent circuits and two control elements allowing the supply of pressurized fluid to each circuit, a first control element being sensitive to a device. actuated by the driver, this first control element controlling the fluid pressure admitted into a first circuit from a first source of pressurized fluid, in particular a hydraulic accumulator, the second control element being sensitive to the fluid pressure in the first braking circuit and, if necessary, the movement of the first control element, this second control element being suitable for controlling the pressure of the fluid admitted into the second circuit from a second source of pressurized fluid, in particular a suspension accumulator.
  • Such a braking control installation is known, in particular from the FR patent. No. 1,293,001.
  • the object of the invention is, above all, to make the braking control installations of the kind in question such that they meet better than hitherto the various requirements of practice and in particular such that their performance is improved with a minimum of additional rooms.
  • a brake control installation for a vehicle is characterized in that the second control element is combined with means sensitive to the load of the vehicle so as to ensure pressure modulation of the fluid in the second circuit according to a rate of change lower than that of the pressure of the first circuit, when the pressure in this first circuit has reached a value which depends on the load of the vehicle.
  • the first and second control elements are advantageously formed by first and second coaxial drawers, slidably mounted in the same bore; the second drawer, forming the second control element, is subjected at its end situated on the side of the first drawer, to the pressure of the fluid of the first circuit and, at its other end, to the pressure of the fluid of the second circuit, the above-mentioned sensitive means to the load being able to exert an axial force on this second slide, from a value of the pressure in the second circuit dependent on the load.
  • the second drawer is slidably mounted, at its end opposite to that subjected to the pressure of the fluid of the first circuit, in a ring which is itself slidably mounted in a bore; this ring which belongs to the means sensitive to the load is subjected, on its face remote from the first drawer, to the pressure of the fluid of the second circuit and to the action of a spring and, on its face turned towards the first drawer, to a force depending on the load of the vehicle.
  • the second source of pressurized fluid is formed by a suspension accumulator
  • the aforesaid face of the ring facing the first drawer is subjected to the pressure of the fluid of this suspension accumulator, this pressure depending on the load of the vehicle.
  • the second circuit generally consists of a rear braking circuit and the second source of pressurized fluid is formed by a rear suspension accumulator.
  • the two drawers forming control elements, the device actuated by the driver, and the means sensitive to the load of the vehicle combined with the second drawer are arranged so as to form an assembly or metering device.
  • the invention also relates to such an assembly or metering device comprising the above first and second control elements and the device actuated by the driver, this metering assembly being characterized by the fact that it comprises means sensitive to the load of the vehicle, combined with the second control element, so as to ensure the modulation of the fluid pressure in the second circuit, when the pressure in the first circuit has reached a value which depends on the vehicle load.
  • a brake control installation F for a motor vehicle comprising two independent circuits, respectively the AV braking circuit for the front wheels and the AR braking circuit for the wheels back.
  • the installation comprises an assembly or metering device 1, constituted, as visible in FIGS. 2 and 3, by a body 2 having a bore 2a in which two drawers 3 and 4 can slide arranged coaxially. These drawers 3 and 4 form two control elements allowing the supply of pressurized fluid to the front and rear circuits respectively.
  • the drawer 3, or first control element, for the first AV circuit is sensitive to a device 5 in particular formed by a pad of elastomeric material capable of being moved by a pedal 6 (fig. 1) actuated by the driver.
  • the pad 5 is fitted on the outer end of the drawer 3.
  • This drawer 3 is provided with an annular groove 7 disposed opposite a use conduit 8 connected to the AV circuit.
  • This groove 7 is suitable for connecting, depending on the position of the drawer 3 along its axis, the operating conduit 8 either with a supply conduit 9 connected to a source of pressurized fluid such as the main hydraulic accumulator 10 of the hydraulic installation of the vehicle, or with a fluid reservoir 11 at relative pressure zero or substantially zero, via an exhaust duct 12 (fig. 3).
  • the drawer 3 is normally held in the closed position of the supply duct 9 and of the opening of the exhaust duct 12 by a spring 13 (fig. 2) disposed between the bottom 2b of a recess in the body 2 and a cup 3a locked axially on the slide 3. This position is shown in FIGS. 2 and 3.
  • the hydraulic accumulator 10 is mounted on the discharge pipe 10a of a pump Q (fig. 1), the suction of which is connected to the reservoir 11.
  • a safety valve v is generally mounted on this pipe 10a.
  • the end of the drawer 3 opposite the buffer 5, or internal end, is subjected to the fluid pressure in the first AV circuit, this pressure prevailing in the chamber 14 between the two drawers 3 and 4 (fig. 2 and 3) .
  • This chamber 14 is connected to the use conduit 8 by an axial bore 15 of the drawer 3 and a radial bore 16 opening into the annular groove 7.
  • the drawer 4, or second control element is sensitive to the fluid pressure in the first AV circuit, since the face of the drawer 4 limiting the chamber 14 is subjected to the pressure prevailing in this chamber, that is to say tell the AV circuit pressure.
  • This drawer 4 is, moreover, if necessary, sensitive to the movement of the drawer 3; indeed, if for any reason the pressure in the AV circuit and in the chamber 14 drops, the slide 3 moving will come into abutment against the slide 4; drawer 4 will therefore be moved mechanically by drawer 3.
  • This drawer 4 is provided with an annular groove 17 disposed opposite a use conduit 18 connected to the second AR braking circuit.
  • This groove 17 is adapted to put in communication, according to the axial position of the drawer 4, the use duct 18 either with a supply duct 19 (fig. 2) or with the reservoir 11 by an exhaust duct 20 ( fig. 3).
  • the supply duct 19 is connected to a second source of pressurized fluid formed by a rear suspension accumulator 21 (FIGS. 1 and 2).
  • the drawer 4 is subjected, at its end remote from the drawer 3, to the pressure of the fluid in the second AR circuit; this pressure prevails in a chamber 22 surrounding the end of the drawer 4, said chamber 22 being connected to the use conduit 18 by a bore 23 of the slide 4 and a radial bore 24 opening into the annular groove 17.
  • the drawer 4 is further subjected, at its end remote from the drawer 3, to the force of a spring 25 which normally keeps the drawer 4 in the closed position of the supply duct 19, and of placing the duct d in communication. exhaust 20 with the use duct 18 (fig 2 and 3).
  • the spring 25 is placed in a blind hole 26a of a cover 26 which ensures the closure of the chamber 22 provided at one end of the body 2.
  • the second control element or drawer 4 is combined with means C sensitive to the load of the vehicle so as to ensure a modulation of the pressure PAR of the fluid in the second circuit AR according to a rate of variation lower than that of the pressure of the first circuit P AV ' when the pressure P AV in the first circuit has reached a value which depends on the vehicle load.
  • the means C sensitive to the load are capable of exerting an axial force, on the second slide 4, from a value of the pressure PAR (in the second circuit) which depends on the load.
  • the means C comprise a ring 27 (fig. 2 and 3) in which the end of the drawer 4 opposite the drawer 3, is slidably mounted.
  • This ring 27 is itself slidably mounted in a bore 2c of the body 2.
  • the ring 27 is normally held in abutment against a shoulder 26b of the cover 26 by the fluid pressure P from the second source 21 which is exerted on the face 27a of the ring 27 facing the first slide 3.
  • the pressure P of the second source 21 is admitted, from the supply conduit 19, into the chamber 28 by a conduit 29, the face 27a limiting this chamber 28.
  • the ring 27 is subjected, on its face 27b remote from the first slide 3, to the pressure PAR of the fluid in the second circuit AR, since this face 27b is located in the chamber 22 where the pressure PAR prevails.
  • the ring 27 is further subjected, at this end, to the action of a spring 30 disposed between the closing cover 26 and a neck. shovel 31 which rests on a ring 32 bearing against a shoulder 33 of the ring 27.
  • the end of the ring 27, facing the cover 26, has radially oriented channels or grooves 34 which allow communication between the chamber 22 and the internal volume of the ring to be maintained, when the end of the ring bears against the shoulder 26b; the pressurized fluid passing through the axial bore 23 can therefore go into the chamber 22.
  • Two sealing segments 35a, 35b are provided in a groove in the bore 2c and surround the ring 27; these two segments cut off all communication, on the outer surface of the ring 27, between the chamber 28 and the chamber 22.
  • the movement of the drawer 4, in the ring 27, in the direction of the cover 26, is limited by a split metal ring 36, engaged in a peripheral groove 37 of the drawer 4.
  • This ring 36 is capable of coming to bear against the face 27a of the ring 27.
  • the drawer 4 occupies the position shown in FIGS. 2 and 3, for which the ring 36 bears against the transverse bottom of the chamber 28, the drawer 4 being pushed into this position by the spring 25.
  • FIG. 5 illustrates an alternative embodiment in which the ring 27 is mounted in a part 40 in the form of a cap, the outer surface 40a of the bottom of which has a convex shape, in particular a spherical shape; by which it rests on the cover 26. 31 leans against part 40.
  • the communication between the use conduit 18 and the chamber 22 takes place through a hole 41 made in the bottom of the part 40.
  • the slide 3 is held in its closed position of the supply duct 9 (fig. 2) and of opening of the exhaust duct 12, by the spring 13.
  • the slide 4 is held in its closed position of the supply duct 19 (fig. 2) and of opening of the exhaust duct 20 (fig. 3) by the spring 25.
  • the ring 27, under the action of the rear suspension pressure P (pressure from the second source) prevailing in the chamber 28 is in abutment against the shoulder 26b of the cover 26 , or against the bottom of the part 40 ( fig. 5).
  • the PAV pressure which is established in the use conduit 8 is transmitted to the chamber 14, by the channels 15 and 16 of the drawer 3.
  • the force generated by the P AV pressure on the drawer 4 causes the displacement of this drawer towards the cover 26, this drawer 4 sliding in the ring 27 which remains stationary.
  • the displacement of the slide 4 causes the exhaust duct 20 to be closed off and the operating duct 18 to communicate with the supply duct 19.
  • the pressure PAR which is established in the use conduit 18 is transmitted to the chamber 22 by the channels 24, 23 of the drawer 4 and the passages 34 of the ring 27, or the hole 41 (fig.5).
  • the pressure of the second circuit PAR remains equal to the pressure P AV of the first circuit.
  • the slide 4, which controls the PAR pressure is subjected to its two opposite ends, which have an equal cross-section, to the action of the pressure P AV and of the pressure PAR respectively.
  • the buffer 5 and the drawer 3 continue to move towards the cover 26.
  • This movement of the drawer 3 causes an increase in the cross-section offered to the pressurized fluid coming from the pipe. supply 9.
  • the pressure P AV in the first circuit will therefore increase; the pressure in the supply line 9 and in the main battery 10 is designated by HP, which corresponds to the maximum possible value for the réelle- sio n P AV.
  • the fluid in the pipe 19 and in the cylinder 21 is at the pressure P s of rear suspension.
  • This pressure P s corresponds to the maximum value that the PAR pressure can take.
  • the displacement of the drawer 4, towards the cover 6, can continue until the ring 36 comes to bear against the face 27a of the ring 27.
  • This ring 27 is subjected, on its faces 27a and 27b, to two opposite forces.
  • the ring 27 remains in abutment against the shoulder 26b, or the part 40 (fig. 5), as long as F ⁇ R + (P AR x S).
  • the drawer 4 will take an equilibrium position determining a pressure PAR such that the forces which act on the assembly of the drawer 4 and of the ring 27 are balanced.
  • the total force exerted on the drawer 4 and the ring 27, and directed towards the cover 26, is equal to P AV xs 1 (force exerted by the pressure in the chamber 14 on the drawer 4), increased by the force P s x S (force on the ring 27 exerted by the pressure in the chamber 28).
  • the equilibrium position of the drawer 4 is a dynamic equilibrium position, that is to say that the drawer 4 oscillates around this position so as either to close the supply conduit 29 and to connect the use pipe 18 of the exhaust 20, if the pressure PAR becomes greater than the value corresponding to the previous relationship, either to close the exhaust pipe 20 and to connect the use pipe 18 to the supply pipe 29 if the pressure PAR becomes lower than the value determined by the previous relationship.
  • the maximum value of the pressure P AV is HP, pressure in the accumulator 10.
  • Curve I corresponds to a lower load; the point A I , of abscissa P CI , from which the pressure PAR is modulated, according to a lesser rate of variation than that of the pressure of the circuit AV, has an abscissa lower than that P CII of the point A Il for which the modulation occurs at a higher load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
EP19810400809 1980-05-22 1981-05-21 Druckdosiereinheit für eine Bedienungseinrichtung für Fahrzeugbremsen Expired EP0041020B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8011453A FR2482917A1 (fr) 1980-05-22 1980-05-22 Installation de commande de freinage pour vehicule et ensemble de dosage pour une telle installation
FR8011453 1980-05-22

Publications (2)

Publication Number Publication Date
EP0041020A1 true EP0041020A1 (de) 1981-12-02
EP0041020B1 EP0041020B1 (de) 1984-03-14

Family

ID=9242240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400809 Expired EP0041020B1 (de) 1980-05-22 1981-05-21 Druckdosiereinheit für eine Bedienungseinrichtung für Fahrzeugbremsen

Country Status (3)

Country Link
EP (1) EP0041020B1 (de)
DE (1) DE3162612D1 (de)
FR (1) FR2482917A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630387A1 (fr) * 1988-04-25 1989-10-27 Peugeot Dispositif de commande de regulateur de freinage
EP0354085A1 (de) * 1988-07-27 1990-02-07 Automobiles Peugeot Lastabhängig gesteuertes Proportionierventil für die Zweikreisbremsanlage eines Kraftfahrzeuges
EP0501078A1 (de) * 1991-02-28 1992-09-02 Alliedsignal Europe Services Techniques Hydraulische Bremsdruckänderungseinheit
WO1995001899A1 (de) * 1993-07-07 1995-01-19 Mannesmann Rexroth Gmbh Hydraulisches druckregelventil, insbesondere hydraulisches fremdkraftbremsventil
CN103465891A (zh) * 2013-09-26 2013-12-25 镇江金天辰新材料有限公司 液压制动系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1293001A (fr) * 1961-03-11 1962-05-11 Citroen Sa Andre Dispositif de freinage hydraulique pour véhicule à suspension hydropneumatique ou hydromécanique
FR1471185A (fr) * 1966-01-03 1967-03-03 Andre Citroen Installation de freinage hydraulique pour véhicule automobile à double circuit avec limiteur de pression et appareil de sécurité
FR2329487A1 (fr) * 1975-11-03 1977-05-27 Wabco Westinghouse Gmbh Installation de frein a deux circuits avec regulation en fonction de la charge, pour vehicules automobiles
FR2393706A1 (fr) * 1977-06-11 1979-01-05 Bosch Gmbh Robert Commande centrale pour l'alimentation en energie de differents organes d'un vehicule
DE2820107A1 (de) * 1978-05-09 1979-11-15 Graubremse Gmbh Druckluft-bremsanlage fuer kraftfahrzeuge
DE2820142A1 (de) * 1978-05-09 1979-11-15 Graubremse Gmbh Mehrkreisbremsventil fuer druckluftbremsanlagen von kraftfahrzeugen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1293001A (fr) * 1961-03-11 1962-05-11 Citroen Sa Andre Dispositif de freinage hydraulique pour véhicule à suspension hydropneumatique ou hydromécanique
FR1471185A (fr) * 1966-01-03 1967-03-03 Andre Citroen Installation de freinage hydraulique pour véhicule automobile à double circuit avec limiteur de pression et appareil de sécurité
FR2329487A1 (fr) * 1975-11-03 1977-05-27 Wabco Westinghouse Gmbh Installation de frein a deux circuits avec regulation en fonction de la charge, pour vehicules automobiles
FR2393706A1 (fr) * 1977-06-11 1979-01-05 Bosch Gmbh Robert Commande centrale pour l'alimentation en energie de differents organes d'un vehicule
DE2820107A1 (de) * 1978-05-09 1979-11-15 Graubremse Gmbh Druckluft-bremsanlage fuer kraftfahrzeuge
DE2820142A1 (de) * 1978-05-09 1979-11-15 Graubremse Gmbh Mehrkreisbremsventil fuer druckluftbremsanlagen von kraftfahrzeugen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630387A1 (fr) * 1988-04-25 1989-10-27 Peugeot Dispositif de commande de regulateur de freinage
EP0354085A1 (de) * 1988-07-27 1990-02-07 Automobiles Peugeot Lastabhängig gesteuertes Proportionierventil für die Zweikreisbremsanlage eines Kraftfahrzeuges
EP0501078A1 (de) * 1991-02-28 1992-09-02 Alliedsignal Europe Services Techniques Hydraulische Bremsdruckänderungseinheit
FR2673409A1 (fr) * 1991-02-28 1992-09-04 Bendix Europ Services Tech Ensemble hydraulique de transformation d'une pression de fluide de freinage au moins partiellement asservi a la charge d'un vehicule.
US5226693A (en) * 1991-02-28 1993-07-13 Bendix Europe Services Techniques Hydraulic assembly for conversion of a pressure of a brake fluid
WO1995001899A1 (de) * 1993-07-07 1995-01-19 Mannesmann Rexroth Gmbh Hydraulisches druckregelventil, insbesondere hydraulisches fremdkraftbremsventil
US5775359A (en) * 1993-07-07 1998-07-07 Mannesmann Ag Hydraulic pressure control valve, especially a hydraulic power brake valve
CN103465891A (zh) * 2013-09-26 2013-12-25 镇江金天辰新材料有限公司 液压制动系统

Also Published As

Publication number Publication date
FR2482917A1 (fr) 1981-11-27
DE3162612D1 (en) 1984-04-19
EP0041020B1 (de) 1984-03-14
FR2482917B1 (de) 1984-12-14

Similar Documents

Publication Publication Date Title
FR2615811A1 (fr) Dispositif d'actionnement de freins pour vehicule automobile
FR2622163A1 (fr) Maitre-cylindre hydraulique en tandem
EP1358098A1 (de) Hydraulisches fahrzeugbremssystem mit aktivem simulator
FR2480692A1 (fr) Dispositif de commande pour le mecanisme a soupape d'un servofrein
EP0156666A1 (de) Bremskraftregler
EP1284902B1 (de) Pedalkraft- oder kettenspannungsdetektor und vorrichtungen mit einem solchen detektor
FR2576261A1 (fr) Generateur de pression de freinage pour vehicule automobile
EP0939713B1 (de) Hilfskraftbremsvorrichtung mit variablem verstärkerverhältnis und verringerter hysterese
EP0041020B1 (de) Druckdosiereinheit für eine Bedienungseinrichtung für Fahrzeugbremsen
FR2481215A1 (fr) Soupape de purge pour un maitre-cylindre a action rapide
FR2463034A1 (fr) Appareil amplificateur de force hydraulique
EP0467725B1 (de) Hydraulikantrieb mit Nachstellvorrichtung
FR2539688A1 (fr) Dispositif de regulation de pression pour frein de roue arriere de vehicule automobile
FR2482918A1 (fr) Maitre cylindre du type tandem et sa soupape de purge pour un systeme de freins
FR2647741A1 (fr) Procede de reglage de la valeur du saut d'un servomoteur d'assistance au freinage
FR2602835A1 (fr) Amplificateur hydraulique d'effort de freinage
FR2562855A1 (fr) Systeme de freinage hydraulique
WO2003059711A1 (fr) Circuit electro-hydraulique de freinage d'un vehicule.
FR2596346A1 (fr) Systeme hydraulique de freinage
FR2531670A1 (fr) Systeme de freinage hydraulique a amplificateur hydraulique de puissance
FR2568954A1 (fr) Regulateur de taux d'amplification pour surpresseur de liquide
FR2496575A2 (fr) Regulateur de pression pour installations de freinage hydraulique pour vehicules automobiles
FR2871199A1 (fr) Pompe a piston munie d'un piston en forme de bille
FR2586983A1 (fr) Systeme de freinage a regulation du glissement
FR2582074A1 (fr) Dispositif de valves de commande de pression de freinage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19811012

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB IT

REF Corresponds to:

Ref document number: 3162612

Country of ref document: DE

Date of ref document: 19840419

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

ITPR It: changes in ownership of a european patent

Owner name: OFFERTA DI LICENZA AL PUBBLICO

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980505

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980729

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990521

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990521

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000301